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Oscar_Ponce_168's avatar
Oscar_Ponce_168
Icon for Nimbostratus rankNimbostratus
Feb 09, 2015

Load Balance ICMP and DNS problem

Hello,

 

I configured a Big-IP for loadbalance of 2 links:

 

  • Node for ISP1 x.x.x.1
  • Node for ISP2 x.x.x.17
  • Pool Internet with Nodes ISP1 and ISP2.
  • Virtual Server Gateway, destination 0.0.0.0 with pool Internet with Round-Robin balance.
  • Virtual Address 0.0.0.0 with ICMP echo disabled.

When I enabled the ICMP echo in Virtual Address 0.0.0.0, I have ping, but the DNS resolution fail. Can you help me?.

 

Regards,

 

Oscar Ponce

 

APM
application delivery
deployment
LTM
security
TMOS

4 Replies

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  • shaggy's avatar
    shaggy
    Icon for Nimbostratus rankNimbostratus
    Feb 09, 2015

    is the virtual server configured for TCP-only or "All Protocols"?

     

  • NikhilB's avatar
    NikhilB
    Icon for Employee rankEmployee
    Feb 09, 2015

    What have you configured as your DNS setttings?

     

    What are trying to resolve?

     

    Can see queries on port 53 via tcpdump?

     

  • Oscar_Ponce_168's avatar
    Oscar_Ponce_168
    Icon for Nimbostratus rankNimbostratus
    Feb 18, 2015

    I don't have a DNS settings on Big-IP. When I enabled the ICMP echo in Virtual address 0.0.0.0, I lost DNS resolution to internet.